The improved meshing engine can now produce a much more desirable result, featuring tools that can easily adjust the amount of smoothing in a welded part.
For those of you unfamiliar with the toolkit, Meta Mesh is a powerful modeling tool that suggests a new modeling technique by allowing you to interactively weld and hollow out your object in the viewport. The engine allows you to easily weld and hollow out SubPatch objects without spoiling models, as if by editing Metaball, just like a perfect metal worker. Meta Mesh could potentially advance your modeling workflow.
You can get more details on Meta Mesh here.